Improvement in regulating watches



C. FASOLDT. REGULATING WATCHES.

Ressued Feb. 20, 1877."4

UNITED STATES PATENT GREECE.A r

oHAnLEs E'AsoL'DT, or' ALBANY, NEW YORK.

`l,rinnovi-:incur in VRiaeilrnrlnc. WATCHES'.

VSpeciiicat-iein-formi);g part of LettersYP-atentNo. 42,175, dated April 5, 1864 reissuelo. '$514, datei; v February 20, 1877 'application tiled November 22, 1875.

To all whom it may concern:- Be it known that I, CHARLES FASOLDT, of

the city and county of Albany and State of New York, 'have invented a new and uset'ul Improvement in Wateheaot which the following is a full and exact description, reference being had to the accompanying drawing, making a part of this'specication, in W ich- Figurel is a plan view of the works of a p watchrhaving my improvement; Fig. 2, an

edge view 'of the same; Fig. 3 is a detached magnified elevation of the stud for holding the outer end ot' the hair-spring, showing'a section of the xed endof the spring. atnthe.

line a: 1v; andFig. 4 a plan view ot' the same. My invention relates tothe time-regulating mechanism of watches, and to the. manner of securingthc'stml'tov whichftheouter endof the hair-spring is fixed audit consists of the devices for those purposes herein shown and described.

The object ot' my linvention is to provide the means for eifecting the most. delicate and accurate regulation ot' the hairspring to perfectly control the vibrations of the balance, to

-producethe correct runningy of the watch,

and'in such manner that when the correct adjustment of the parts is once obtained it can be perfectly preserved during the removal and replacement of the parts, wheurequired1 for cleaning or repairs. .y

As shown in the drawing, A'is the foundation-plate of the watch, to which the various parts-of the movement'.v are secured in the usual manner, and to which no special ref erence is required, except tothose parts'l relnt ing to and constituting my invention. B isa bridge, forming/the bearing for the upper end of the shaft ofthe balance-wheel, upon which is placed thebo'Wf-spring having one of "its",

side bars G1 secured ina xed position by the screws C? to the bridgeB. From the extremity of lthe stationary side bar C1 a stud, D, is dependent, which has ashank,'d, ot smaller diameter', for entering the hole formed in the bar G1 for its reception, and -in which it is secured by the set-screw E. When preferred, the stud D may be inserted in a prolongation of the bridge B, or secured in a likefl'nanner to any other iixed and convenient point. The

with a hole tapped to 'receive the regulating-- screw F, the end ot'` which hears against the iixed side bar U1, for the purpose of forcingy the two side bars' apart against the resistance of the spring which, as the screwF is turned backward, forces the free side bar C' by carries the loop or fork (attached to the changed in one direction by the adjustingscrew. F,and in the reverse direction by fmeans of the spring C. G isA the hair-spring the inner end of which is attached in the usual manner -to the shaft of the balance-wheel and shank d1 of which is flattened on the aidev spring will ,lead in the correct direction, whereby the proper regulation of the watch becomes greatly complicated. His a loop or fork, dependent from the end of the side bar the hair-spring G passes before it is titaclred to the stud D.I

The regulation is effected' by turniiig the tance between the side bars Cl and C3, as occasion may require. In doing this the loop r fork H is correspondingly-moved toward dr from the stud D, diminishing or increasing the power/of the hair-spring G. It will readily be seen that by means of thescrew F the confined to such minute distances as to renwhile the effect upon the action of the hairextremity of the free side' bar Gais provided l toward-the stationary side bar G1, and therefree sidebar, as hereinafter described) toward the stud D, to which the outer end ofthe hair-spring is secured. .From this it will be' seen that the position of the loop or fork is4 against'which the set-screw E bears, so as to l `l I.insure the return of the stud and* hair-sprin sert the stndfin the hole so that the hair C3, through which 'the outer convoluion of` screw F so as to increase or dimnishg the dismovement given to the loop or fork H may be der their measurement almost impossible,-

spring in the regulation of the watch will be quite Vmarked and perceptible, and that by a series of these very slight changes a pert'ect adjustment of the parts can be obtained to secure the running of the Watch on perfectly correct time. This degree of perfect-ion in the regulation oi' watches having the ordinary regulating mechanism,.if it can be obtained at all, can only beefl'ected by chance, as the adjustment .of the time-regulator in that class of watches is dependent upon the uncertain action of the hand and eye. By my improvement, when the perfect adjustment of the regu- .lation is once effected, by leaving the regulating-screw F undisturbed in its place, it can be retained through any subsequent removals and replacement of the parts, and by securingthe stud D in the manner herein described, whereby 1' provide for its ready removal and restoration to its correct position, the maintenance of the regulation is greatly facilitated.

It is manifest that the regulatingscrew F may be applied to any form of spring instead of the bow-spring C, herein described; and

that it may be applied for the adjustment of v'spring Gyas and for t the loop H in relation to the outer end ofthe hair-spring G' in many different ways that w`iil readily suggest themselves t'othose skilled in' the art; and while I preferably apply it in the manner herein shown and described4 I do no confine myself to such a construction.

I claim as my invention- 1. In combination with the time-rcgulating mechanism ot' a. watch, the regnlatingscrew F, as and for the purpose herein set forth.

2. The combination of the regulating-screw F and loop or fork H with the hair-spring G, as and for the pu' ose specified. 3. The combinat `n of the regulating-screw F, loop or fork H, ai stud D, with the hairpnrpose specified. 4. vThe combination the spring C and regulating-screw F, as and for the purpose set forth. I

5. The combination of the stud D with the set-screw E, substantially as and for the purpose specified. f Y

CHARLES FASOLDT. Witnesses:

l- E. MAx'FAsoLDT, WILLIAM H.-Lo.w. 

